Patent US3762424A successfully refreshed from Google Patents.
US3762424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hair roller means
Assignee: Unisys Corp
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Filing: 1971-09-20
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Granted: 1973-10-02
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Expires: 1991-09-20
Abstract
Abstract An improvement in heatable and moistenable hair rollers having end edges and a smooth outer surface. The roller provided has an outer surface provided with means, such as a plurality of protrusions, for increasing the outer surface area, and thus the moisture retaining capacity of the roller. In addition, moisture guiding means are provided, such as a groove located adjacent each of the end edges, for preventing excess moisture on the rollers from overflowing the end edges and scalding the user''s fingers. The invention may also include the provision of tapered end edges, to form rims for reducing the rate of dissipation of heat from the end edges of the roller.
Inventors
- 👤 Keung Chen Nai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:08
CPC Classifications
A; A45; A45D; A45D4/00; A45D4/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
An improvement in heatable and moistenable hair roller means having a smooth outer surface and opposed end edges, the improvement comprising: a. means on the outer surface of the hair roller means for increasing the outer surface area thereof to retain more moisture thereon, the surface area increasing means including a plurality of uniformly dimensioned flexible resilient protrusions, b. moisture guiding means in communication with the outer surface for preventing excess moisture thereon from overflowing the end edges, the guiding means including spaced circumferential grooves, one of said grooves located adjacent and parallel to each of said end edges, and c. each of said end edges being reduced in area to form a rim.
Claim 2
Dependent Claim
114 words
An improvement in heatable and moistenable hair roller means having a smooth outer surface and opposed end edges, the improvement comprising: a. means on the outer surface of the hair roller means for increasing the outer surface area thereof to retain more moisture thereon, the surface area increasing means including a plurality of uniformly dimensioned flexible resilient protrusions, b. moisture guiding means in communication with the outer surface for preventing excess moisture thereon from overflowing the end edges, the guiding means including spaced circumferential grooves, one of said grooves located adjacent and parallel to each of said end edges, and c. each of said end edges being reduced in area to form a rim.
Claim 3
Dependent Claim
23 words
The improvement according to claim 1, wherein the opposed end edges are respectively tapered relative to the surface area to provide said rims.
Claim 4
Dependent Claim
83 words
The improvement according to claim 1 wherein each of said protrusions are circularly shaped protrusions, the height of each of said protrusions is not more than twenty thousandths of an inch and not less than eight thousandths of an inch, the diameter of each of said protrusions is not more than eighty thousandths of an inch, and a sufficient number of said protrusions are provided per square inch of the smooth outer surface area to increase said area at least approximately 25 percent.
Claim 5
Dependent Claim
105 words
An improvement in heatable and moistenable hair roller means having a smooth outer surface and opposed end edges, the improvement comprising: means on the outer surface of the hair roller means for increasing the outer surface area thereof to retain more moisture thereon, the surface area increasing means including a plurality of flexible resilient circularly shaped protrusions measuring at least eight thousandths of an inch in height and not more than eighty thousandths of an inch in diameter, and a sufficient number of said protrusions are provided per square incH of the smooth outer surface area to increase said area at least approximately 25 percent.
Claim 6
Dependent Claim
105 words
An improvement in heatable and moistenable hair roller means having a smooth outer surface and opposed end edges, the improvement comprising: means on the outer surface of the hair roller means for increasing the outer surface area thereof to retain more moisture thereon, the surface area increasing means including a plurality of flexible resilient circularly shaped protrusions measuring at least eight thousandths of an inch in height and not more than eighty thousandths of an inch in diameter, and a sufficient number of said protrusions are provided per square incH of the smooth outer surface area to increase said area at least approximately 25 percent.
Claim 7
Dependent Claim
45 words
The improvement according to claim 4 wherein each of said protrusions measure from eight thousandths of an inch in height to twenty thousandths of an inch in height and from thirty thousandths of an inch in diameter to eighty thousandths of an inch in diameter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |